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- W2002136921 abstract "An amorphous silica membrane with an excellent hydrogen/nitrogen (H 2 /N 2 ) permselectivity of >10 000 and a He/H 2 permselectivity of 11 was successfully synthesized on a γ‐alumina (γ‐Al 2 O 3 )‐coated α‐alumina (α‐Al 2 O 3 ) porous support by counter diffusion chemical vapor deposition using tetramethylorthosilicate and oxygen at 873 K. An amorphous silica membrane possessed a high H 2 permeance of >1.0 × 10 −7 mol·(m 2 ·s·Pa) −1 at ≥773 K. The dominant permeation mechanism for He and H 2 at 373–873 K was activated diffusion. On the other hand, that for CO 2 , Ar, and N 2 at 373–673 K was a viscous flow. At ≥673 K, that for CO 2 , Ar, and N 2 was activated diffusion. H 2 permselectivity was markedly affected by the permeation temperature, thickness, and pore size of a γ‐Al 2 O 3 mesoporous intermediate layer." @default.
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- W2002136921 date "2007-12-17" @default.
- W2002136921 modified "2023-10-18" @default.
- W2002136921 title "Relationship between the Mesoporous Intermediate Layer Structure and the Gas Permeation Property of an Amorphous Silica Membrane Synthesized by Counter Diffusion Chemical Vapor Deposition" @default.
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- W2002136921 doi "https://doi.org/10.1111/j.1551-2916.2007.02073.x" @default.
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